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Scarcity and high cost of good-quality water for irrigation in the Kuwait environment, which is located in an extremely arid region, necessitate the utilization of underground brackish water. However, productivity of most vegetable crops is reduced tremendously when irrigated with such low-quality water. Consequently, a tomato-breeding program had been launched to develop tomato cultivars that are well-adapted to the local conditions. The present work is a 2-year field study to compare the performance of four locally developed vs. eight imported tomato cultivars under saline irrigation water (brackish). The experiment was laid out in a completely randomized block design with four replications. Dimensions of each experimental unit was 2 × 2.5 m (5 m 2 ). Fertilization and other cultural practices followed those recommended for the local environment and soil was sandy in texture. Prior to transplanting seedlings to field, they had been irrigated with nonsaline water. Total dissolved solutes of the brackish water used for irrigation was 7500 mg.L -1 . A total of seven harvests were collected on a weekly basis. There were no significant differences among tomato cultivars in terms of total fruit weights in the first four harvests. However, beginning with the fifth harvest, two of the locally developed cultivars (Kuwait-16 and Kuwait-20) were among the highest in total yield for two consecutive years in this study. It is therefore recommended that these Kuwaiti tomato cultivars be used to replace the several expensively imported varieties, which, though high yielding, are not necessarily so in the Kuwait environment, or may be salt-sensitive cultivars. Combining the local varieties with the use of less expensive brackish water could reduce the expense of farming significantly in this region of the world.

294 Comparative Studies of Local vs. Imported Tomato Cultivars under Saline Irrigation Water